[70temp455]

I was also a bit confused. Thanks B Man for the great information!
What are the original P axles (how many splines) that I have ? 72 LeMans.
I didn't look while inside the housing, are the 8.5 axles press-in or C-Clip.
I did however install a PowerTrax unit in my Tempest so I did get to tinker around in there a bit but appearently I I need to know more about what I'm gettin into.
So now I understand that I need a new Carrier if I plan on going up in gear.
How difficult is teh carrier/differential change.
I've rebuilt engines and I rebuilt a Trans but not a Diff. "yet".
Thanks,
Andy

[70temp455]

Currently running a old worn out 350-2bbl TH350.
Maybe next year a 400.
I want a decent street able gear but I also like going for country cruises and 200 mile drive to Norwalk. But then again I love to get on it hard also. I'm thinkingh the Tempest I had was decent enough with a 455 and a 3.08 gear.
I can get a 3.42 but I'm thing it may be a bit too high for long Highway cruising but I never had a 3.42 so don't have any experience here.
How would a 3.23 compare in the mix.
comparisons between 3.08, 3.23, 3.42 ? ?
What do yall have and what likes and dislikes about them !
Thanks,
Andy